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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#define STR_BUFFER_SIZE 500 |
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// ******************************************************* |
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// Uncomment the following two tyedefs to support multiple |
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// input files |
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// ******************************************************* |
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typedef struct{ |
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char fileName[STR_BUFFER_SIZE]; |
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FILE* filePtr; |
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} fileStruct; |
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typedef struct linkedNameTag { |
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char name[STR_BUFFER_SIZE]; |
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struct linkedNameTag* next; |
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} linkedName; |
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// ******************************************************* |
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// end multiple file support |
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// ******************************************************* |
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char *programName; /*the name of the program */ |
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void usage(void); |
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int main(argC, argV) |
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int argC; |
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char *argV[]; |
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{ |
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int i,j; // loop counters |
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char* outPrefix; // the output prefix |
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char* conversionCheck; |
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int conversionError; |
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int optionError; |
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char currentFlag; // used in parsing the flags |
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int done = 0; // multipurpose boolean |
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int havePrefix; // boolean for the output prefix |
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int flag1; |
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char flag1Arg1[STR_BUFFER_SIZE]; |
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char flag1Arg2[STR_BUFFER_SIZE]; |
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int flag2; |
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double flag2Val; |
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int flag3; |
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int rFlag; |
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int iFlag, iVal; |
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// ********************************************************** |
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// to support single or multiple input files, uncomment the |
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// appropriate declarations |
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// ********************************************************** |
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// single: |
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// char* inName; |
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// FILE* inFile; |
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// *********************************************************** |
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// multiple: |
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fileStruct* inputArray; |
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linkedName* headName; |
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linkedName* currentName; |
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int nInputs; |
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// end input file declarations |
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// *********************************************************** |
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// intialize default values |
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// ******************************************** |
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// single input: |
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// inName = NULL; |
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// inFile = NULL; |
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// ********************************************* |
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// multiple input: |
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nInputs = 0; |
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inputArray = NULL; |
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headName = NULL; |
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currentName = NULL; |
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// end file initialization |
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// ********************************************** |
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outPrefix = NULL; |
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conversionError = 0; |
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optionError = 0; |
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havePrefix = 0; |
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flag1 = 0; |
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flag2 = 0; |
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flag3 = 0; |
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rFlag = 0; |
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iFlag = 0; |
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flag2Val = 0.0; |
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iVal = 0; |
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// here we set the name of the program need by the usage message |
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programName = argV[0]; |
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for( i = 1; i < argC; i++){ |
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|
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if(argV[i][0] =='-'){ |
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|
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// parse the option |
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if(argV[i][1] == '-' ){ |
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// parse long word options |
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if( !strcmp( argV[i], "--flag1" ) ){ |
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flag1 = 1; // set flag1 to true |
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i++; |
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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for flag1\n"); |
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usage(); |
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exit(0); |
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} |
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strcpy( flag1Arg1, argV[i] ); |
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i++; |
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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for flag1\n"); |
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usage(); |
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exit(0); |
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} |
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strcpy( flag1Arg2, argV[i] ); |
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} |
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else if( !strcmp( argV[i], "--flag2" ) ){ |
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flag2 = 1; // set the flag2 to true; |
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i++; |
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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for flag2\n"); |
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usage(); |
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exit(0); |
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} |
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flag2Val = strtod( argV[i], &conversionCheck ); |
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if( conversionCheck == argV[i] ) conversionError = 1; |
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if( *conversionCheck != '\0' ) conversionError = 1; |
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if( conversionError ){ |
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fprintf( stderr, |
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"Error converting \"%s\" to a double\n", argV[i] ); |
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usage(); |
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exit(0); |
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} |
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} |
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else if( !strcmp( argV[i], "--flag3") ){ |
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flag3 = 1; // set flag3 to be true |
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} |
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// anything else is an error |
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else{ |
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fprintf( stderr, |
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"Invalid option \"%s\"\n", argV[i] ); |
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usage(); |
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exit(0); |
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} |
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} |
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else{ |
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// parse single character options |
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done =0; |
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j = 1; |
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currentFlag = argV[i][j]; |
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while( (currentFlag != '\0') && (!done) ){ |
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switch(currentFlag){ |
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case 'h': |
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// -h => give the usage help message |
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usage(); |
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exit(0); |
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break; |
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case 'o': |
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// -o <prefix> => the output prefix. |
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j++; |
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currentFlag = argV[i][j]; |
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if( currentFlag != '\0' ) optionError = 1; |
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if( optionError ){ |
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fprintf( stderr, |
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"\n" |
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"The -o flag should end an option sequence.\n" |
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" example: -ro <outname> *NOT* -or <outname>\n" ); |
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usage(); |
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exit(0); |
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} |
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i++; |
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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for -o\n"); |
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usage(); |
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exit(0); |
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} |
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outPrefix = argV[i]; |
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if( outPrefix[0] == '-' ) optionError = 1; |
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if( optionError ){ |
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fprintf( stderr, |
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"\n" |
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"\"%s\" is not a valid out prefix/name.\n" |
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"Out prefix/name should not begin with a dash.\n", |
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outPrefix ); |
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usage(); |
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exit(0); |
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} |
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havePrefix = 1; |
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done = 1; |
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break; |
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case 'r': |
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// the r flag |
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rFlag = 1; // set rflag to true |
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break; |
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case 'i': |
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// -i <int> set <int> to the iVal |
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iFlag = 1; // set iFlag to true |
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j++; |
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currentFlag = argV[i][j]; |
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if( currentFlag != '\0' ) optionError = 1; |
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if( optionError ){ |
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fprintf( stderr, |
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"\n" |
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"The -i flag should end an option sequence.\n" |
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" example: -ri <int> *NOT* -ir <int>\n" ); |
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usage(); |
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exit(0); |
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} |
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i++; |
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if( i>=argC ){ |
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fprintf( stderr, |
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"\n" |
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"not enough arguments for -i\n"); |
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usage(); |
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exit(0); |
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} |
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iVal = (int)strtol( argV[i], &conversionCheck, 10 ); |
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if( conversionCheck == argV[i] ) conversionError = 1; |
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if( *conversionCheck != '\0' ) conversionError = 1; |
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if( conversionError ){ |
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fprintf( stderr, |
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"Error converting \"%s\" to a int\n", argV[i] ); |
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usage(); |
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exit(0); |
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} |
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done = 1; |
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break; |
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default: |
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(void)fprintf(stderr, |
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"\n" |
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"Bad option \"-%c\"\n", currentFlag); |
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usage(); |
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} |
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j++; |
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currentFlag = argV[i][j]; |
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} |
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} |
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} |
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else{ |
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// ******************************************************** |
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// for only a single input file, leave this as it is. |
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// ******************************************************** |
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// if( inName != NULL ){ |
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// fprintf( stderr, |
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// "\n" |
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// "Error at \"%s\", program does not currently support\n" |
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// "more than one input file.\n" |
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// "\n", |
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// argV[i]); |
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// usage(); |
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// exit(0); |
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// } |
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// inName = argV[i]; |
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// ************************************************************* |
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// ************************************************************ |
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// To support more than one input file, uncomment the following |
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// section. |
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// ************************************************************ |
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nInputs++; |
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currentName = (linkedName *) malloc( sizeof( linkedName ) ); |
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if( currentName == NULL ){ |
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fprintf( stderr, |
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"\n" |
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"Ran out of memory\n" ); |
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exit(0); |
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} |
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strcpy( currentName->name, argV[i] ); |
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currentName->next = headName; |
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headName = currentName; |
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// ********************************************************** |
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// end multiple input files |
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// ********************************************************** |
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} |
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} |
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// initialize the input file(s) |
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// *********************************************************** |
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// single file: |
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// if(inName == NULL){ |
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// fprintf( stderr, |
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// "\n" |
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// "Error, no input file was given\n"); |
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// usage(); |
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// exit(0); |
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// } |
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mmeineke |
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|
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// inFile = fopen( inName, "r" ); |
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// if( inFile == NULL ){ |
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// fprintf( stderr, |
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// "\n" |
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// "Error trying to open \"%s\" for reading\n", |
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// inName ); |
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// exit(0); |
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// } |
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|
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// ************************************************************** |
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// multiple files: |
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399 |
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if( !nInputs ){ |
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fprintf( stderr, |
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"\n" |
403 |
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"Error, no input files were given\n"); |
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usage(); |
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exit(0); |
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} |
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408 |
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// create the input array |
409 |
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inputArray = (fileStruct *) calloc( nInputs, sizeof( fileStruct ) ); |
411 |
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if( inputArray == NULL ){ |
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fprintf(stderr, |
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"\n" |
414 |
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"Ran out of memory\n" ); |
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exit(0); |
416 |
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} |
417 |
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418 |
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j = nInputs - 1; |
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currentName = headName; |
420 |
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while( currentName != NULL ){ |
421 |
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422 |
mmeineke |
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strcpy( inputArray[j].fileName, currentName->name ); |
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inputArray[j].filePtr = NULL; |
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j--; |
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currentName = currentName->next; |
426 |
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} |
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428 |
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// delete linked list |
429 |
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430 |
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while( headName != NULL ){ |
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432 |
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currentName = headName; |
433 |
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headName = currentName->next; |
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435 |
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free( currentName ); |
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} |
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|
438 |
|
|
|
439 |
|
|
// open the files for reading |
440 |
|
|
|
441 |
|
|
for(i=0; i<nInputs; i++){ |
442 |
|
|
|
443 |
mmeineke |
522 |
inputArray[i].filePtr = fopen( inputArray[i].fileName, "r" ); |
444 |
mmeineke |
521 |
if( inputArray[i].filePtr == NULL ){ |
445 |
|
|
|
446 |
|
|
fprintf( stderr, |
447 |
|
|
"\n" |
448 |
|
|
"Error trying to open \"%s\" for reading\n", |
449 |
|
|
inputArray[i].fileName ); |
450 |
|
|
exit(0); |
451 |
|
|
} |
452 |
|
|
|
453 |
|
|
//read and do stuff here |
454 |
|
|
|
455 |
|
|
} |
456 |
|
|
|
457 |
|
|
// ************************************************************* |
458 |
|
|
// end file opening |
459 |
|
|
// ************************************************************* |
460 |
|
|
|
461 |
|
|
|
462 |
|
|
|
463 |
mmeineke |
522 |
// or read and do stuff here. |
464 |
mmeineke |
521 |
|
465 |
|
|
|
466 |
|
|
|
467 |
|
|
|
468 |
mmeineke |
522 |
|
469 |
mmeineke |
521 |
// close files when we are done. |
470 |
|
|
|
471 |
|
|
// *********************************************************** |
472 |
|
|
// single: |
473 |
|
|
|
474 |
mmeineke |
522 |
// fclose( inFile ); |
475 |
mmeineke |
521 |
|
476 |
|
|
// ************************************************************* |
477 |
|
|
// multiple: |
478 |
|
|
|
479 |
|
|
for( i=0; i<nInputs; i++){ |
480 |
|
|
|
481 |
|
|
fclose( inputArray[i].filePtr ); |
482 |
|
|
} |
483 |
|
|
|
484 |
|
|
free( inputArray ); // free the input Array if we are done; |
485 |
|
|
inputArray = NULL; |
486 |
|
|
|
487 |
|
|
// ************************************************************ |
488 |
|
|
// end file closing |
489 |
|
|
// ************************************************************ |
490 |
|
|
|
491 |
mmeineke |
518 |
} |
492 |
|
|
|
493 |
|
|
|
494 |
|
|
/*************************************************************************** |
495 |
|
|
* prints out the usage for the command line arguments, then exits. |
496 |
|
|
***************************************************************************/ |
497 |
|
|
|
498 |
|
|
void usage(){ |
499 |
|
|
(void)fprintf(stdout, |
500 |
mmeineke |
522 |
"\n" |
501 |
mmeineke |
520 |
"The proper usage is: %s [options] <input_file>\n" |
502 |
mmeineke |
518 |
"\n" |
503 |
|
|
"Options:\n" |
504 |
|
|
"\n" |
505 |
|
|
" short:\n" |
506 |
|
|
" ------\n" |
507 |
|
|
" -h Display this message\n" |
508 |
mmeineke |
520 |
" -o <name> The output name/prefix\n" |
509 |
|
|
" -r the r flag\n" |
510 |
mmeineke |
521 |
" -i <int> set number to <#>\n" |
511 |
mmeineke |
518 |
|
512 |
|
|
"\n" |
513 |
|
|
" long:\n" |
514 |
|
|
" -----\n" |
515 |
mmeineke |
520 |
" --flag1 <arg1> <arg2> does flag 1 for arg1 and 2\n" |
516 |
mmeineke |
521 |
" --flag2 <double> does flag 2 for double\n" |
517 |
mmeineke |
520 |
" --flag3 does flag 3\n" |
518 |
mmeineke |
518 |
|
519 |
|
|
"\n" |
520 |
|
|
"\n", |
521 |
mmeineke |
522 |
programName); |
522 |
mmeineke |
521 |
exit(0); |
523 |
mmeineke |
518 |
} |